Grinding-machine.



. B. M. W. HANSON.

GRINDING MACHINE.

APPLIOATION FILED APR. 9, 1910.

@83,2%6. Patented @11.31, w11

3 SHEETS-SHEET l.

B. M. W. HANSN.

GRINDING MACHINE.

AYPLIOATION FILED APE. s, 1910.

Patented Jan. 31, 1911.

3 SHEETS-SHEET 2.

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GRINDING MACHINE.

APPLICATION FILED APR. a, 1910.

@@ggga Patented .12.11.31, 1911.

3 SHEETS-SHEET 3.

:BENGT M. W. HNSON, 0F HARTFORDfCONNECTIC-TIT, ASSIGNOR TO PRATT 8c WHITNEY COMPANY, 0F HARTFORD, CONNECTICUT, A CORPORATION OF NEW JERSEY.

GRINDINGr-MACHINE.

aaneen.

Specification of Letters Patent.

Application l1ed-April 9, 1910. Serial No. 554,450.

To all whom 'it may concern:

Be it known that I, BENGT M. WV. HAN son, a citizen of the United States, residing at Hartford, in the county of Hartford and State of Connecticut, have invented certain new and useful Improvement-s in Grinding- Machines, of which the following is a speciication.

This invention relates to grinding 1nachinos. Y

A grinding machine generally comprises a rotary disk or Wheel, and the host driving etl'ecttherefor can he obtained by utilizing helting, in that, the disk or wheel can he operated at a higher spoed With such a type ot drive than by the use of gears.

it is one of the primary purposes of my invention to provide a machine ot' this type, having av tiltable tool carrier and belt-driving nleehanism, in connection with the tool on said tool carrier, comprising a primary or driving pulley and a secondary1 or driven pulley, the parts being so related that the tool carrier, which is usually in the torni oi' a swinging column, can be adjusted withA out affecting the proper working relation between the two pulleys, it being understood that the tilting of the carrier or column, is utilized to secure concaved work.

Another object of the invention is to provide mechanism for feeding the tool in such manner that the various adjustnients ot the column or tool carrier atl'eet in no wiso thc proper 'l'eed of thevtool, being as might he remarked, in the present instance, a step hy step one.

In the drawings accompanying and forming part of the present specification, l illus trate in detail one convenient form of em.- hodiment of the`invention, which to enable those skilled in the art to p acticc said invention will he set forth fully in the followl ing description, while the novelty of the invention will he included in the claims succeeding the said description.

Referring to said drawings: Figure l is a front elevation of a grinding machine including my invention. Fig. 2 is a rear elc vation partially in section and with parts removed, of the base and a portion of the column of the apparatus. Fig. 3 i's a horizontal section on the line 3 3 of Fig. 2. Fig. 4 is a vertical section of the base or bed and certainicoperating parts, and, Fig.

5 is a front elevation of the column and the grinding or reducinof wheel.

Like characters reter to like parts throughout the several figures.

The different parts of the machine may be carried by a bed or hase as 2 andv a leg or :toot piece 3, associated with the bed, the two parts being adapted to present together a three-point support. The bed 2 sustains a reciprocatory Work support 4, but as this in itself forms no part of the present invention, it not necessary to describe in detail the construction and mode of operation oi the same. The tool is represented as consisting' of a grinding Wheel er disk 5 and it. will be clear that when the lower liat tace ot said wheel or disk, which is the active portion thereof, is presented at an angle to the carriage 4, coneaved 'Work Will be the result 'and by varying this angular relation, which is secured hy the tilting 0i the column 6, the characterof the coneavity can he regulated. The column G is shown provided at its forward side with a forwardlyprojecting hub 7, which turns or rocks, in a ring 8 rigidly fitted in an opening in the rear side of the hed 2, said huh 'i' being conneettal with the column (3 in some suitable manner, tor instance, hy screws. The leg` or foot-piece 3, is provided at its upper end with a hub S) fitted Within an opening in the rear oi the column (i. said huh 9 heilig` Isiihstantially in line with the hul) i'. .said tu'o hubs constitutin;y suitable pivots or trunnionsI for the column.

'l`he tool 5 is carried hv the head l0, which slides up and dou'n in suitable waysl in said column said tool 5 lining fastened in some convenient manner to the shaft ll .supported hy suitable. hearingsI upon said column. lt will, tluret'ore, he evident that upon rotation of the .shaft 'll the grinding wheel or tool 5 will he turned. The t'eod motion of the wheel is secured in the prefont ease h v the ini t'ermittent downward movement ol' the head l0. The .sha Et ll is shown ashaving fastened at its upper end a driven pulley lZ which rcceives the holt l?) extending trom the dri`v ing pulley 14. the heltalso passing around the guide or idler pulleys l5 supported at opposite ends of the sha'tt lo, carried hy the column 6 and transverse to the shaft l0. rlhe pulley 14 rotates on the shaft 14e', which is tubular and which is fitted in the hub f),

lratentcd Jan. 31, i911.

being held from displacement by the cap plate or disk 14 suitably connected therewith as by screws. lt will he seen that the pulley 14 and tiltable column G turn about an axis in common, that is to say, they are coaxial, so that there will always be a proper driving relation between the pulley 14 and the pulley 12 in all the angular adjustments of the tiltable column 6. The pulley 14 may be operated in any desirable manner, for instance, by the pulley 17,

the two being ordinarily connected together' for this purpose, the pulley 17 in practice being preferably driven by an overhead pulley. (Not shown). It is conceivable, of course, that the pulley 14 might be otherwise operated.

The tiltable column G is shown provided at, or near, its lower end with lateral flanges 20, which bear against the bed or base 2 as best indicated in Fig. 3. Connected with the base or bed 2 and overlying these flanges 20 are gibs or clamping members 2l. The gibs or clamping members 21 are connected with the bed 2 by the outer and inner sets of screws 22 and 23 respectively, the inner screws 23 extending through arcuate slots 24 in the two tlanges 20, as indicated in Fig. 2, these slots being concentric with the axis of motion of the tiltable column I have shown as tapped into the bodies of the gibs or clamping members 21, adjusting screws 25, the inner ends of which bear against the outer edges of the two flanges 20. It will be assumed that all the screws occupy the positions shown in Fig. 3 and it is necessary y to adjust the column 6 toward the left 1n said ligure.

To accomplish this the screws 22 and 23 are backed out, thereby freeing the column G from clamping effect, the screw 25 on the left is then run out the desired distance, after which the other screw v 25 is run in, the latter serving to swing the column over until the flange 20 on the left abuts against the companion screw 25 at which point the screws 22 and 23 will be set up to maintain the adjustment. In view of the fact that there are two sets of screws operative in connection with each clamping member or gib 21, there is no vpossibility of the column fallingl forward when said screws are loosened or backed out to obtain the adjustment of said column.

There is shown extending through the bed or base 2 from front to rear thereof, the shaft 30. This shaft is common in grinding machines and is given an intermittent movement so as to effect, through the aid of in` termediate parts, the feeding action of the head l0 and therefore the grinding wheel lt is therefore unnecessary to .describe in detail the character of the operating means for said shaft; they may be of the usual or any other desired character. This shaft 30, it will be observed. is coaxial with the tiltable column 6 and it is shown having at its inner end a bevel pinion 3l in mesh with the bevel gear 32 at the lower end of the shaft 34 supported by suitable bearings on the tiltablc column 6 and adapted therefore to swing therewith. Y

Splined or feathered, to the approximately upright shaft 34 is a worm 35 in mesh with a worm gear 36, the shaft 37 of which is supported by the head 10 and carries a pinion 37- in Ines-h with a spur-gear 35, the shaft 39 of which carries a pinion ll0 in mesh with the rack bar al1 fastened in some suitable manner to the column '6, the two shafts 37 and 39 being rotatively supported by bearings on' the head 10. Said head 10 is equipped with a forked member 42 suitably fastened thereto and which receives between its branches the worm lt will therefore be evident that on each forward motion of the shaft the grinding wheel 5 through the described connectionsl will be advanced or fed downward one step.

lllhat I claim is:

1. A. grinding machine comprising a bed provided with a reciprocatory work support, a tiltable column, a reducing member, means for rotating said reducing member, comprising driving and driven pulleys,lthe driving pulley being coaxial with the tiltable column, a rotary shaft also coaxial with said tiltable column, and means operated by said shaft for imparting an advancing movement to the reducing member.

2. A grinding machine comprising a bed provided with a reciprocatory work, support, a tiltable column provided with a reducing member for the work, mechanism for rotating said reducing member, comprising driving and driven pulleys the driving pulley being coaxialwith said column,.a rotary shaft also coaxial with the column, a 'shaft supported by the column, to swing therewith and operatively connected with said first mentioned shaft, and means operative by the second shaft for advancing the reducing member..

In testimony whereof I allix my signature in presence of two witnesses.

BENGT M. W. HANSON. Witnesses:

W. U. SToRRs, H. W. KrLoURNn. 

